It is very simple to add multiple rails apps in your NginX server. Here I’m using an example of 2 rails apps with 3 mongrels serving each app. This is what you need to do in your nginx.conf. … upstream mongrel_app1 { server 127.0.0.1:1000; server 127.0.0.1:1001; server 127.0.0.1:1002; } upstream mongrel_app2 { server 127.0.0.1:2000; server [...]